/Engine/Plugins/Experimental/StructUtils/Source/StructUtils/Public/PropertyBag.h
Value Setters. A property must exists in that bag before it can be set. Numeric types (bool, int32, int64, float, double) support type conversion.
[EPropertyBagResult](API\Plugins\StructUtils\EPropertyBagResult) SetValueBool ( const int32 Index, const bool bInValue )